66249018422437 has 2 divisors, whose sum is σ = 66249018422438. Its totient is φ = 66249018422436.

The previous prime is 66249018422417. The next prime is 66249018422501. The reversal of 66249018422437 is 73422481094266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66184586722881 + 64431699556 = 8135391^2 + 253834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66249018422437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66249018422417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33124509211218 + 33124509211219.

It is an arithmetic number, because the mean of its divisors is an integer number (33124509211219).

Almost surely, 2^{66249018422437} is an apocalyptic number.

It is an amenable number.

66249018422437 is a deficient number, since it is larger than the sum of its proper divisors (1).

66249018422437 is an equidigital number, since it uses as much as digits as its factorization.

66249018422437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27869184, while the sum is 58.

The spelling of 66249018422437 in words is "sixty-six trillion, two hundred forty-nine billion, eighteen million, four hundred twenty-two thousand, four hundred thirty-seven".